摘要
采用溶胶-凝胶法制备了MnO2/膨胀石墨(MnO2/EG)纳米材料,分别利用扫描电镜、X射线衍射测试其表面形貌及结构,使用循环伏安和恒流充放电等表征其电化学性能。结果表明,制备的MnO2/EG纳米材料在6mol/L KOH电解质溶液中的比电容量为492F/g;2000次循环后,比容量仅损失1%,且充放电效率仍高于99%,表现出良好的电化学性能。
MnO2/exfoliated graphite nanomaterial（MnO2/EG） was synthesized via a new sol gel route. Scanning electron microscope was employed for surface microscope and Xray diffraction was used for structure characterization. Cyclic vohammetry and galvanostatic charge/discharge measurements were applied to investigate the electrochemical performance of the MnO2/EG electrodes. When used for electrodes of supercapacitors, the as-prepared MnO2/EG in 6mol/L KOH electrolyte showed high specific capacitance values of 492F/g; the galvanostatic charge discharge measurements showed approximately 1 % loss of capacitance after 2000 cycles, and charge-discharge efficiency above 99%, the synthesized nanomaterial exhibited excellent electrochemical characteristics.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2011年第14期78-81,共4页
Materials Reports
基金
教育部第二届大学生研究性学习和创新性实验计划项目(091053014)
